EXTSRNAL FABASITES. 101 



powder is on him to prevent him from licking it. For this purpose 

 a canvas-faced muzzle is the safest and hest. Care should also be 

 taken that the dog is not exposed to wet while the precipit!».te is on 

 him, aa it would be difficult to remove it from the coat after wetting. 

 It is also advisable that the person brushing the precipitate out of 

 the coat should wear a light covering over mouth and nose during 

 the operation. An equally effective remedy is the Lime-and-Sulphur 

 Lotion prescribed for MANGE. If the coat and skin be thoroughly 

 saturated with it, and left so for ten minut«s. or a quarter of aa 

 hour, all that will be left of the insects wiU be shrivelled carcases. 

 The dog should then be well washed with soap and warm water and 

 thoroughly combed and brushed tiU he is perfectly dry. Foj 

 delicate dogs, and those with tender skins, the lotion should bs 

 reduced in strength, by adding equal, or even two, parts of water to 

 one of lotion, and if any doubt exist in the operator's mind aa to the 

 course to take, let him try the weaker solution first, and watch its 

 effects, when he can make it stronger as required. Olive oU 2 parts, 

 and paraflSn 1 part, is another good insecticide, as is also the follow- 

 ing : dissolve ioz. of hard soap in 1 quart of water, and add to thia 

 ^oz. of oil of stavesaore. Bub this preparation well into the skin, 

 allow it to remain on for three days, at the end of which time wash 

 off with hot water and soap, well dry, and repeat the dressing. The 

 dog must be muzzled, as the dressing is poisonous. 



These dressings should be repeated in eight days, in order to it 

 stroy the young Uce hatched from the " nits," or eggs, laid before ths 

 previous dressing. 



Trichodectes latus plays a very important part, being the inter- 

 mediary host of one of the tapeworms of the dog. The history is ass 

 curious as it is important for dog-owners to know, and I therefore quotf: 

 the following from Dr. Spencer Cobbold, who says : " The joints of the 

 worm, having escaped per anus, readily crawl as semi-independent 

 creatures on the coat of the dog, chiefly on the back and sides. The 

 eggs thus distributed are readily swallowed by the louse of the dog 

 [Trichodectes latus). 



"In the body of the louse, the six-hooked embryo, hitherto 

 eontained in the egg of the tapeworm, escapes the shell, and 

 becomes transformed into a minute cyeticercus, or louse measls. 

 When the dog is irritated by the lice, it attacks, bites, and frequently 

 swallows the offending external parasite. In this way the lonse- 

 measle is transferred to the dog's iatestinal canal, where, in course of 

 time, it develops into the sexually mature cucumerine tapeworm. " 



The above very curious and important bit of history of the taps- 

 worm and the dog louse should teach the practical lesson of thorough 

 &nd constant cleanliness in the kennel. 



